Definitely plan on maxxing them all, but for starting out, Jewelcrafting and Tailoring for me, Cooking and Artifice for my wife.
The system overall looks well thought out. I personally prefer the more complex creation process such as EQ2 or Vanguard's crafting. But, playing the resource collection game can be plenty of fun as well. Very interested to dive into the crafting sphere of this game. I have no qualms about spending all my time gathering and crafting at launch if it grabs me enough, especially with how the pvp ramps you to 80. That said, this system seems to mirror WoW, Rift, and SWToR, and while decent, I didn't find the crafting very addictive.